/**
 * 点击波纹效果
 *
 * @param  {[event]} e        [description]
 * @param  {[Object]} arg_opts [description]
 * @return {[bollean]}          [description]
 */
export default function(e, arg_opts) {
  const opts = {
    ele: e.target, // 波纹作用元素
    type: 'hit', // hit点击位置扩散center中心点扩展
    bgc: 'rgba(0, 0, 0, 0.15)', // 波纹颜色
    ...arg_opts
  }
  const target = opts.ele
  if (target) {
    const rect = target.getBoundingClientRect()
    let ripple = target.querySelector('.e-ripple')
    if (!ripple) {
      ripple = document.createElement('span')
      ripple.className = 'e-ripple'
      ripple.style.height = ripple.style.width = `${Math.max(rect.width, rect.height)}px`
      target.appendChild(ripple)
    } else {
      ripple.className = 'e-ripple'
    }
    switch (opts.type) {
      case 'center':
        ripple.style.top = `${rect.height / 2 - ripple.offsetHeight / 2}px`
        ripple.style.left = `${rect.width / 2 - ripple.offsetWidth / 2}px`
        break
      default:
        ripple.style.top = `${e.pageY - rect.top - ripple.offsetHeight / 2 - document.body.scrollTop}px`
        ripple.style.left = `${e.pageX - rect.left - ripple.offsetWidth / 2 - document.body.scrollLeft}px`
    }
    ripple.style.backgroundColor = opts.bgc
    ripple.className = 'e-ripple z-active'
    return false
  }
}
